<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<style>
    a {
        text-decoration: none;
        color: black;
        font-size: 18px;
    }

    h4 {
        width: 180px;
        height: 38px;
        margin: 100px auto;
        text-align: center;
        line-height: 38px;
        background-color: lightpink;
        border-radius: 5px;
    }
</style>
<body>
<h4>
    <a href="main.html">进入系统</a>
</h4>

</body>
</html>